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| author | Jean Delvare <khali@linux-fr.org> | 2005-11-26 21:00:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-01-05 22:16:22 -0800 |
| commit | cde7859bda0d1124392b44e50aa11df99707e1d9 (patch) | |
| tree | c852e7ff9b44b5e59f6ae75951514585f0ff10d9 /drivers/i2c/i2c-core.c | |
| parent | cb748fb20186d4b345c68a7f580429f379fdd268 (diff) | |
| download | lwn-cde7859bda0d1124392b44e50aa11df99707e1d9.tar.gz lwn-cde7859bda0d1124392b44e50aa11df99707e1d9.zip | |
[PATCH] i2c: Rework client usage count, 2 of 3
Make I2C_CLIENT_ALLOW_USE the default for all i2c clients. It doesn't
hurt if the usage count is actually never used for any given driver,
and allows for nice code simplifications in i2c-core.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 28 |
1 files changed, 10 insertions, 18 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 2f0bc9529376..d16b4998c4c2 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -419,8 +419,7 @@ int i2c_attach_client(struct i2c_client *client) } } - if (client->flags & I2C_CLIENT_ALLOW_USE) - client->usage_count = 0; + client->usage_count = 0; client->dev.parent = &client->adapter->dev; client->dev.driver = &client->driver->driver; @@ -443,8 +442,7 @@ int i2c_detach_client(struct i2c_client *client) struct i2c_adapter *adapter = client->adapter; int res = 0; - if ((client->flags & I2C_CLIENT_ALLOW_USE) - && (client->usage_count > 0)) { + if (client->usage_count > 0) { dev_warn(&client->dev, "Client [%s] still busy, " "can't detach\n", client->name); return -EBUSY; @@ -499,12 +497,9 @@ int i2c_use_client(struct i2c_client *client) if (ret) return ret; - if (client->flags & I2C_CLIENT_ALLOW_USE) { - if (client->usage_count > 0) - goto busy; - else - client->usage_count++; - } + if (client->usage_count > 0) + goto busy; + client->usage_count++; return 0; busy: @@ -514,16 +509,13 @@ int i2c_use_client(struct i2c_client *client) int i2c_release_client(struct i2c_client *client) { - if(client->flags & I2C_CLIENT_ALLOW_USE) { - if(client->usage_count>0) - client->usage_count--; - else { - pr_debug("i2c-core: %s used one too many times\n", - __FUNCTION__); - return -EPERM; - } + if (!client->usage_count) { + pr_debug("i2c-core: %s used one too many times\n", + __FUNCTION__); + return -EPERM; } + client->usage_count--; i2c_dec_use_client(client); return 0; |